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Chapter-2 Things and Connections
Q41.
SPI डिवाइस _________ में संचार करता है

SPI device communicates in _______
A. Simplex
B. Half duplex
C. Full duplex
D. Both half and full duplex
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Q42.
SPI कितनी लाइनों का उपयोग करता है?

SPI uses how many lines?
A. 4 lines
B. 1 line
C. 3 lines
D. 2 lines
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Q43.
CoAP कौन सी परत है?

Which layer is CoAP?
A. Control layer
B. Transport layer
C. Service layer
D. Application layer
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Q44.
कौन सा ओपन मानक है?

Which is an open standard?
A. CoAP
B. MQTT
C. XMPP
D. Both A and B
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Q45.
MQTT का उपयोग मुख्य रूप से __________ के लिए किया जाता है

MQTT is mainly used for __________
A. M2M communication
B. Device communication
C. Internet communication
D. Wireless communication
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